Development of palygorskite-SO42−/ZnAl2O4 composites as a novel solid acid catalyst for the esterification of acetic acid with n-butanol

Wang, Junxia; Wang, Anqi; Tian, Xiaoyun; Wang, Hui; Xu, Mingliang; Yang, Lixia

doi:10.1016/j.clay.2016.11.001

Cited by 12 publications

(5 citation statements)

References 34 publications

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“…In the esterification reaction, the amount of supported heteropolyacid catalyst was generally 1–5 wt %. , With reference to this range, the impact of the catalyst dosage was investigated. Figure b illustrates the impact of the amount of catalyst within the range of 0–4 wt % on the extraction coupling esterification of rice husk vinegar liquid.…”

Section: Resultsmentioning

confidence: 99%

“…The esterification of model compounds typically involved an alcohol to acid ratio ranging from 2 to 5, , and bio-oil was commonly esterified using an alcohol-to-liquid ratio of 1–2 . In the rice husk vinegar, the proportion of organic matter was lower than that of bio-oil. , Therefore, a lesser amount of n -butanol was required for esterification compared to bio-oil.…”

Section: Resultsmentioning

confidence: 99%

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A General Strategy for Efficient Upgrading of Biomass-Derived Rice Husk Vinegar with ZrO₂ Supported HSiW Catalyst: Extractive Coupling Esterification

Shi,

Jiang,

Yang

et al. 2024

Energy Fuels

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Rice husk vinegar, a byproduct of biomass pyrolysis, can be refined to increase its value and reduce harmful emissions. This study synthesized a range of HSiW solid acid catalysts supported by ZrO 2 using impregnation and investigated the esterification of rice husk vinegar, a biomass pyrolysis liquid rich in acetic acid. The catalytic esterification experiment was performed on an extraction coupling esterification reaction device to enrich acetic acid and improve conversion. The physicochemical characterization of catalysts verified their improved catalytic performance with an increased calcined temperature, as it amplifies the Brønsted/Lewis ratio. Esterification results indicated that the 30-HZ (300) catalyst underwent a conversion of 94.02%, at the temperature of 130 °C, alcohol-to-liquid ratio of 0.5, catalyst dose of 3 wt %, and reaction period of 4 h. The catalyst retained 91% of its conversion at the fifth cycle. The catalyst facilitated the conversion of most short-chain organic acids to esters, some oxidation of n-butanol and ketones, and the etherification of n-butanol. These results are beneficial for the high-value transformation and application of rice husk vinegar and future research on biomass pyrolytic liquids.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

A General Strategy for Efficient Upgrading of Biomass-Derived Rice Husk Vinegar with ZrO₂ Supported HSiW Catalyst: Extractive Coupling Esterification

Shi,

Jiang,

Yang

et al. 2024

Energy Fuels

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“…For example, Carboxymethyl chitosan/chitosan nanocarriers having anionic surfaces extensively disintegrate TJs leading to more strong permeability if compared to similar nanovesicles carrying positive charge on their surfaces. Another clear example, insulin bioavailability is significantly higher when administered in anionic surface nanocarriers (49).…”

Section: Anionic Surfacesmentioning

confidence: 99%

Impact of Surface Design and Coating on The Efficacy of Nano-Carriers as Drug Delivery Systems: A Review

Ahmed

Youssef

Megahed

2023

ERU Research Journal

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The bioavailability of poorly soluble medications can be greatly improved by the use of nanocarriers (NCs) where; loading of drugs within NCs could improve the solubility, prevent degradation through enzymes of GIT and enhance the passage crosswise the gel mucus layer and absorption membrane. The surface chemistry of most of nanocarriers greatly affects all properties of NCs, specifically, food interaction, diffusion behavior through the gel mucus layer, and providence on the absorption membrane. Bioinert surfaces greatly decrease the interaction with GI fluids. Adhesive surfaces offer near connection with the mucosa of GIT and absorption. Moreover, charge-converting surfaces facilitate targeted drug release by shifting their zeta potential from negative to positive at absorption membranes. In addition, Active surfaces may cleave mucus glycoproteins. In this review, we deliberate the different types of surface modification of NCs and their impact on the efficacy of NCs as successful drug delivery systems. Moreover, the different techniques applied for NCs surface modifications through the use of diverse biomaterials to change their physicochemical characteristics, pharmacokinetic qualities, and pharmacological activity.Surface engineering may be utilized by undercoating the NCs either through the use of noncovalent bonds, covalent bonds, or special techniques.

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“…PAL is a natural 1D nanoscale magnesium-aluminum-rich silicate clay mineral with nanorod-like crystal morphology, rich pores, and surface groups . It has been widely used in the chemical industry and agriculture, for surface coatings and environmental purposes, , as well as in catalysis as a catalyst or a catalyst support. − However, natural PAL usually contains a large amount of impurities that decrease the active adsorption sites (i.e., surface groups, pores, and surface charges), thus leading to a decrease in adsorption capability. Therefore, the modification of PAL by a suitable method is a feasible way to enhance its adsorption properties and extend its application as a high-efficiency adsorbent .…”

Section: Introductionmentioning

confidence: 99%

Removal of Olefins from Reforming Aromatic Hydrocarbons over Metal-Halide-Modified Acid-Activated Palygorskite

Guo

Zhang

et al. 2020

Energy Fuels

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A series of acid-activated palygorskite (PAL)-supported metal halides catalysts were synthesized and applied to remove trace olefins from aromatic hydrocarbons. The structural properties and surface acidity of acid-activated PAL were determined by X-ray diffraction (XRD), N2 adsorption/desorption, and NH3-TPD. According to experimental results, the optimum metal halide was CoCl2, and its loading content was 7 wt % with an olefin conversion of 92.1%. Furthermore, the 10%CoCl2/PAL-B21 catalyst before and after the olefin removal reaction was characterized by XRD, FE-SEM, FTIR, N2 adsorption/desorption, NH3-TPD, and XPS. The BET surface area (S BET) of PAL-B21 decreased by 129 m2/g after modification by 10%CoCl2. It was indicated that the interaction between CoCl2 and PAL-B21, the textural properties, and the surface acid sites are all important for the adsorption and conversion of olefins from reforming aromatic hydrocarbons by an alkylation reaction. The low cost, high olefin conversion, and good stability of the CoCl2-modified PAL-B21 catalyst provide industrial application potential for olefin removal from reforming aromatic hydrocarbons.

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Development of palygorskite-SO42−/ZnAl2O4 composites as a novel solid acid catalyst for the esterification of acetic acid with n-butanol

Cited by 12 publications

References 34 publications

A General Strategy for Efficient Upgrading of Biomass-Derived Rice Husk Vinegar with ZrO₂ Supported HSiW Catalyst: Extractive Coupling Esterification

A General Strategy for Efficient Upgrading of Biomass-Derived Rice Husk Vinegar with ZrO₂ Supported HSiW Catalyst: Extractive Coupling Esterification

Impact of Surface Design and Coating on The Efficacy of Nano-Carriers as Drug Delivery Systems: A Review

Removal of Olefins from Reforming Aromatic Hydrocarbons over Metal-Halide-Modified Acid-Activated Palygorskite

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Development of palygorskite-SO42−/ZnAl2O4 composites as a novel solid acid catalyst for the esterification of acetic acid with n-butanol

Cited by 12 publications

References 34 publications

A General Strategy for Efficient Upgrading of Biomass-Derived Rice Husk Vinegar with ZrO2 Supported HSiW Catalyst: Extractive Coupling Esterification

A General Strategy for Efficient Upgrading of Biomass-Derived Rice Husk Vinegar with ZrO2 Supported HSiW Catalyst: Extractive Coupling Esterification

Impact of Surface Design and Coating on The Efficacy of Nano-Carriers as Drug Delivery Systems: A Review

Removal of Olefins from Reforming Aromatic Hydrocarbons over Metal-Halide-Modified Acid-Activated Palygorskite

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Product

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A General Strategy for Efficient Upgrading of Biomass-Derived Rice Husk Vinegar with ZrO₂ Supported HSiW Catalyst: Extractive Coupling Esterification

A General Strategy for Efficient Upgrading of Biomass-Derived Rice Husk Vinegar with ZrO₂ Supported HSiW Catalyst: Extractive Coupling Esterification